Chore: Update Dockerfile to Liquidsoap 2.1.0

Dockerfile

 
-FROM savonet/liquidsoap:v2.0.5
+FROM savonet/liquidsoap:v2.1.0
 LABEL maintainer="David Trattnig <david.trattnig@subsquare.at>"
 
 USER root
@@ -8,7 +8,6 @@ USER root
 RUN apt update --allow-releaseinfo-change && apt -y install \
       alsa-utils \
       libssl-dev
-      # libgstreamer-ocaml-dev
 
 # Setup Engine
 RUN mkdir -p /srv/src